Kingspan Insulation Thermaroof TR26 flat roof board Kingspan Insulation

Kingspan Thermaroof TR26

High performance rigid Polyisocyanurate (PIR) flat roof insulation board

Can be used on flat roofs with mechanically fixed single-ply waterproofing membranes.

Fully compatible with most mechanically fixed single–ply waterproofing systems.

Compatible with most green roof systems.

Fibre–free core; manufactured with a blowing agent that has zero ODP and low GWP.

Ideal for new build and refurbishment.

Resistant to the passage of water vapour.

Thicknesses and Availability:

Available in most popular thicknesses from the manufacturer; short lead-times may apply as we may need to get stock in before delivering to site.

This Thermaroof Range includes the following readily available product thicknesses: 25mm, 50mm, 60mm, 70mm, 80mm, 90mm, 100mm, 110mm, 120mm, 140mm and 150mm.

The folllowing thicknesses are manufactured to order: 40mm, 105mm, 115mm, 125mm, 130mm, 135mm, and 160mm; these may carry minimum order levels.

Due to supply challenges from the manufacturers, please allow extended lead times on all PIR boards. Please feel free to contact me to check availability and lead times.

Product Information

General information about Kingspan Thermaroof TR26

Product Application

Flat roof insulating board

Kingspans high performance polyisocyanurate (PIR) foam board, Thermaroof TR26, is suitable for use in flat roofs waterproofed with mechanically fixed single-ply waterproofing and most green roof applications.

Product Make-up

Core

Kingspan Thermaroof TR26 is manufactured with Nilflam technology, a high performance fibre–free rigid thermoset polyisocyanurate (PIR) insulant manufactured with a blowing agent that has zero Ozone Depletion Potential (ODP) and low Global Warming Potential (GWP)

Facings

Faced on both sides with a low emissivity composite foil, autohesively bonded to the insulation core during manufacture

Product Properties

Thermal Conductivity 0.022 W/m·K
Compressive Strength 150 kPa at 10% compression BS EN 826: 2013
Nominal Density 32 kg/m³
Board Length 2.4m
Board Width 1.2m
Board Edge Square
Vapour Resistance > 100 MNs/gm BS / I.S. EN 12086: 2013

Product Prices

Buy Kingspan Thermaroof TR26

The prices and quantity discounts below are 'per pack' rates. Packs contain multiple boards... 12 x 1.2x2.4m = 34.56m² - in this instance, there are 12 x boards in a pack where each board is 1.2m x 2.4m providing a total coverage of 34.56m² per pack.

Availability Undetermined - Special circumstances are involved in the supply of these products. Kingspan TR26 25mm, 12 x 1.2x2.4m = 34.56m² - ranging from £6.60 to £6.90 per m²

1 x pack @ £6.90 per m² / £19.89 per board = £238.63 (£286.36 inc-VAT) per pack
2 x packs @ £6.84 per m² / £19.71 per board = £236.52 (£283.82 inc-VAT) per pack
3 x packs @ £6.78 per m² / £19.53 per board = £234.40 (£281.28 inc-VAT) per pack
4 x packs @ £6.72 per m² / £19.36 per board = £232.29 (£278.75 inc-VAT) per pack
5 x packs @ £6.66 per m² / £19.18 per board = £230.18 (£276.22 inc-VAT) per pack
6 x packs @ £6.60 per m² / £19.01 per board = £228.07 (£273.68 inc-VAT) per pack

Availability Undetermined - Special circumstances are involved in the supply of these products. Kingspan TR26 50mm, 6 x 1.2x2.4m = 17.28m² - ranging from £9.94 to £10.40 per m²

1 x pack @ £10.40 per m² / £29.94 per board = £179.65 (£215.58 inc-VAT) per pack
2 x packs @ £10.30 per m² / £29.68 per board = £178.06 (£213.67 inc-VAT) per pack
3 x packs @ £10.21 per m² / £29.41 per board = £176.47 (£211.76 inc-VAT) per pack
4 x packs @ £10.12 per m² / £29.15 per board = £174.88 (£209.86 inc-VAT) per pack
5 x packs @ £10.03 per m² / £28.88 per board = £173.29 (£207.95 inc-VAT) per pack
6 x packs @ £9.94 per m² / £28.62 per board = £171.70 (£206.04 inc-VAT) per pack

Availability Undetermined - Special circumstances are involved in the supply of these products. Kingspan TR26 60mm, 5 x 1.2x2.4m = 14.4m² - ranging from £11.42 to £11.94 per m²

1 x pack @ £11.94 per m² / £34.40 per board = £172.00 (£206.40 inc-VAT) per pack
2 x packs @ £11.84 per m² / £34.10 per board = £170.48 (£204.58 inc-VAT) per pack
3 x packs @ £11.73 per m² / £33.79 per board = £168.96 (£202.75 inc-VAT) per pack
4 x packs @ £11.63 per m² / £33.49 per board = £167.44 (£200.93 inc-VAT) per pack
5 x packs @ £11.52 per m² / £33.18 per board = £165.91 (£199.09 inc-VAT) per pack
6 x packs @ £11.42 per m² / £32.88 per board = £164.39 (£197.27 inc-VAT) per pack

Availability Undetermined - Special circumstances are involved in the supply of these products. Kingspan TR26 70mm, 4 x 1.2x2.4m = 11.52m² - ranging from £13.30 to £13.91 per m²

1 x pack @ £13.91 per m² / £40.07 per board = £160.26 (£192.31 inc-VAT) per pack
2 x packs @ £13.79 per m² / £39.71 per board = £158.84 (£190.61 inc-VAT) per pack
3 x packs @ £13.67 per m² / £39.36 per board = £157.43 (£188.92 inc-VAT) per pack
4 x packs @ £13.54 per m² / £39.00 per board = £156.01 (£187.21 inc-VAT) per pack
5 x packs @ £13.42 per m² / £38.65 per board = £154.59 (£185.51 inc-VAT) per pack
6 x packs @ £13.30 per m² / £38.29 per board = £153.17 (£183.80 inc-VAT) per pack

Availability Undetermined - Special circumstances are involved in the supply of these products. Kingspan TR26 80mm, 4 x 1.2x2.4m = 11.52m² - ranging from £14.93 to £15.62 per m²

1 x pack @ £15.62 per m² / £44.98 per board = £179.91 (£215.89 inc-VAT) per pack
2 x packs @ £15.48 per m² / £44.58 per board = £178.32 (£213.98 inc-VAT) per pack
3 x packs @ £15.34 per m² / £44.18 per board = £176.73 (£212.08 inc-VAT) per pack
4 x packs @ £15.20 per m² / £43.79 per board = £175.14 (£210.17 inc-VAT) per pack
5 x packs @ £15.06 per m² / £43.39 per board = £173.54 (£208.25 inc-VAT) per pack
6 x packs @ £14.93 per m² / £42.99 per board = £171.95 (£206.34 inc-VAT) per pack

Availability Undetermined - Special circumstances are involved in the supply of these products. Kingspan TR26 90mm, 3 x 1.2x2.4m = 8.64m² - ranging from £17.49 to £18.30 per m²

1 plus packs @ £18.30 per m² / £52.69 per board = £158.08 (£189.70 inc-VAT) per pack
3 plus packs @ £18.13 per m² / £52.23 per board = £156.68 (£188.02 inc-VAT) per pack
5 plus packs @ £17.97 per m² / £51.76 per board = £155.28 (£186.34 inc-VAT) per pack
7 plus packs @ £17.81 per m² / £51.29 per board = £153.88 (£184.66 inc-VAT) per pack
9 plus packs @ £17.65 per m² / £50.83 per board = £152.49 (£182.99 inc-VAT) per pack
11 plus packs @ £17.49 per m² / £50.36 per board = £151.09 (£181.31 inc-VAT) per pack

Availability Undetermined - Special circumstances are involved in the supply of these products. Kingspan TR26 100mm, 3 x 1.2x2.4m = 8.64m² - ranging from £18.26 to £19.11 per m²

1 plus packs @ £19.11 per m² / £55.04 per board = £165.11 (£198.13 inc-VAT) per pack
3 plus packs @ £18.94 per m² / £54.55 per board = £163.65 (£196.38 inc-VAT) per pack
5 plus packs @ £18.77 per m² / £54.06 per board = £162.19 (£194.63 inc-VAT) per pack
7 plus packs @ £18.60 per m² / £53.58 per board = £160.73 (£192.88 inc-VAT) per pack
9 plus packs @ £18.43 per m² / £53.09 per board = £159.26 (£191.11 inc-VAT) per pack
11 plus packs @ £18.26 per m² / £52.60 per board = £157.80 (£189.36 inc-VAT) per pack

Availability Undetermined - Special circumstances are involved in the supply of these products. Kingspan TR26 110mm, 3 x 1.2x2.4m = 8.64m² - ranging from £19.47 to £20.38 per m²

1 plus packs @ £20.38 per m² / £58.68 per board = £176.04 (£211.25 inc-VAT) per pack
3 plus packs @ £20.19 per m² / £58.16 per board = £174.48 (£209.38 inc-VAT) per pack
5 plus packs @ £20.01 per m² / £57.64 per board = £172.92 (£207.50 inc-VAT) per pack
7 plus packs @ £19.83 per m² / £57.12 per board = £171.36 (£205.63 inc-VAT) per pack
9 plus packs @ £19.65 per m² / £56.60 per board = £169.81 (£203.77 inc-VAT) per pack
11 plus packs @ £19.47 per m² / £56.08 per board = £168.25 (£201.90 inc-VAT) per pack

Availability Undetermined - Special circumstances are involved in the supply of these products. Kingspan TR26 120mm, 2 x 1.2x2.4m = 5.76m² - ranging from £21.55 to £22.55 per m²

1 plus packs @ £22.55 per m² / £64.93 per board = £129.86 (£155.83 inc-VAT) per pack
4 plus packs @ £22.35 per m² / £64.36 per board = £128.72 (£154.46 inc-VAT) per pack
7 plus packs @ £22.15 per m² / £63.79 per board = £127.57 (£153.08 inc-VAT) per pack
10 plus packs @ £21.95 per m² / £63.21 per board = £126.42 (£151.70 inc-VAT) per pack
13 plus packs @ £21.75 per m² / £62.64 per board = £125.27 (£150.32 inc-VAT) per pack
16 plus packs @ £21.55 per m² / £62.06 per board = £124.12 (£148.94 inc-VAT) per pack

Availability Undetermined - Special circumstances are involved in the supply of these products. Kingspan TR26 140mm, 2 x 1.2x2.4m = 5.76m² - ranging from £27.15 to £28.41 per m²

1 plus packs @ £28.41 per m² / £81.82 per board = £163.64 (£196.37 inc-VAT) per pack
4 plus packs @ £28.16 per m² / £81.10 per board = £162.19 (£194.63 inc-VAT) per pack
7 plus packs @ £27.91 per m² / £80.37 per board = £160.74 (£192.89 inc-VAT) per pack
10 plus packs @ £27.66 per m² / £79.65 per board = £159.30 (£191.16 inc-VAT) per pack
13 plus packs @ £27.40 per m² / £78.93 per board = £157.85 (£189.42 inc-VAT) per pack
16 plus packs @ £27.15 per m² / £78.20 per board = £156.40 (£187.68 inc-VAT) per pack

Availability Undetermined - Special circumstances are involved in the supply of these products. Kingspan TR26 150mm, 2 x 1.2x2.4m = 5.76m² - ranging from £27.72 to £29.01 per m²

1 plus packs @ £29.01 per m² / £83.55 per board = £167.09 (£200.51 inc-VAT) per pack
4 plus packs @ £28.75 per m² / £82.81 per board = £165.61 (£198.73 inc-VAT) per pack
7 plus packs @ £28.49 per m² / £82.07 per board = £164.13 (£196.96 inc-VAT) per pack
10 plus packs @ £28.24 per m² / £81.33 per board = £162.65 (£195.18 inc-VAT) per pack
13 plus packs @ £27.98 per m² / £80.59 per board = £161.17 (£193.40 inc-VAT) per pack
16 plus packs @ £27.72 per m² / £79.85 per board = £159.69 (£191.63 inc-VAT) per pack

Less popular product commonly available at selected depots. Bostik Idenden T303 tape, 100mm x 50m = 50lm - ranging from £0.13 to £0.14 per lm

1 plus rolls @ £0.14 per lm = £6.78 (£8.14 inc-VAT) per roll
5 plus rolls @ £0.13 per lm = £6.72 (£8.06 inc-VAT) per roll
10 plus rolls @ £0.13 per lm = £6.66 (£7.99 inc-VAT) per roll
15 plus rolls @ £0.13 per lm = £6.60 (£7.92 inc-VAT) per roll
20 plus rolls @ £0.13 per lm = £6.54 (£7.85 inc-VAT) per roll
25 plus rolls @ £0.13 per lm = £6.48 (£7.78 inc-VAT) per roll

Limited stock of the most popular boards sizes may be held at some of our larger depots.

Where products need to be brought in from Kingspan, please allow approx. 1 week for delivery on stocked items (highlighted in green below in the properties section) and up to 3 weeks on made to order thicknesses. While Kingspan keep the majority of the popular thicknesses in stock, less popular thicknesses may carry a minimum order level.

Kingspan reserves the right to change stocked products - while we will do all we can to keep on top of changes, availability and lead times my vary.

Please observe the 'Star Rating' indicators to assess availability.
Product Availability Excellent Generally 1 or 2 days for delivery
Product Availability Good Generally 1 to 5 days for delivery
Product Availability Fair Generally 5 to 10 days for delivery
Product Availability Poor Generally 5 to 15 days for delivery
Product Availability Undetermined Please call to check availability and approximate lead times

Product availability depends upon stock levels at closest depot and delivery logistics to geographic locations


Product Performance and Guides

Product Performance, Manufacturer Certification, Downloads, and Installation Guides

Thermal Resistance

While we have provided Thermal Resistance values for all thicknesses on the Kingspan TR26 datasheet, some thicknesses may not be readily available.

Items highlighted in green are generally held in stock by Kingspan.

Product Thickness Thermal Resistance kg/m²
Kingspan TR26 25mm 25mm 1.10 m²K/W 1.11 kg/m²
Kingspan TR26 40mm 40mm 1.80 m²K/W 1.50 kg/m²
Kingspan TR26 50mm 50mm 2.25 m²K/W 1.80 kg/m²
Kingspan TR26 60mm 60mm 2.70 m²K/W 2.15 kg/m²
Kingspan TR26 70mm 70mm 3.15 m²K/W 2.50 kg/m²
Kingspan TR26 80mm 80mm 3.60 m²K/W 2.80 kg/m²
Kingspan TR26 90mm 90mm 4.05 m²K/W 3.25 kg/m²
Kingspan TR26 100mm 100mm 4.50 m²K/W 3.50 kg/m²
Kingspan TR26 105mm 105mm 4.75 m²K/W 3.65 kg/m²
Kingspan TR26 110mm 110mm 5.00 m²K/W 3.99 kg/m²
Kingspan TR26 115mm 115mm 5.20 m²K/W 4.01 kg/m²
Kingspan TR26 120mm 120mm 5.45 m²K/W 4.10 kg/m²
Kingspan TR26 125mm 125mm 5.65 m²K/W 4.42 kg/m²
Kingspan TR26 130mm 130mm 5.90 m²K/W 4.60 kg/m²
Kingspan TR26 135mm 135mm 6.10 m²K/W 4.78 kg/m²
Kingspan TR26 140mm 140mm 6.35 m²K/W 4.80 kg/m²
Kingspan TR26 150mm 150mm 6.80 m²K/W 5.10 kg/m²
Kingspan TR26 160mm 160mm 7.25 m²K/W 5.59 kg/m²

Standards & Approval

Kingspan Thermaroof TR26 is manufactured to the highest standards in accordance with requirements BS 4841–4 (Rigid polyisocyanurate (PIR) and polyurethane (PUR) products for building end–use applications. Specification for laminated boards (roofboards) with auto–adhesively or separately bonded facings for use as roofboard thermal insulation under single–ply roofing membranes).

Kingspan Thermaroof TR26 is also manufactured to the highest standards under a management system certified to ISO 9001: 2015 (Quality management systems. Requirements), ISO 14001: 2015 (Environmental Management Systems Requirements), BS / I.S OHSAS 18001: 2007 (Occupational Health and Safety Management Systems Requirements) and ISO 50001: 2018 (Energy Management Systems Requirements with Guidance for Use).

The use of Kingspan Thermaroof TR26 produced at Kingspan Insulation’s Pembridge and Selby manufacturing facilities is covered by BBA Certificate 16/5332.

Flat Roof Installation

Over Metal Deck specific
  • Metal decks should be clean, dry, without large projections, steps or gaps, and should be graded to allow correct falls to all rainwater outlets.
  • If using a sealed metal deck there is no requirement for a separate vapour control layer.
  • If the metal deck is not sealed, and the insulation boards are to be bonded down, in order to ensure an adequate bond between the metal deck and the vapour control layer, the metal deck should be suitably primed, in accordance with the primer manufacturer’s instructions, prior to the application of the hot bitumen, or suitable alternative proprietary adhesive system, used to bond the vapour control layer to the deck.
  • If the metal deck is not sealed, and the insulation boards are to be mechanically fixed, the vapour control layer should be loose–laid.
  • Over Concrete Deck specific
  • Concrete decks should be clean, dry, without large projections, steps or gaps, and should be graded to allow correct falls to all rainwater outlets.
  • The vapour control layer should be loose–laid over the deck.
  • If the insulation boards are to be mechanically fixed, the vapour control layer should be loose–laid.
  • Over Ply Deck specific
  • Timber decks should be clean, dry, without large projections, steps or gaps, and should be graded to allow correct falls to all rainwater outlets.
  • The vapour control layer should be temporarily stapled or nailed to the deck.
  • Over Existing Flat Roof specific
  • The existing waterproofing membrane surface should be clean, dry, without large projections, steps or gaps, and should be graded to allow correct falls to all rainwater outlets.
  • Where the existing waterproofing membrane is not fit for purpose as a vapour control layer, and the new insulation boards are to be bonded down, a separate vapour control layer should be bonded to it with hot bitumen, or suitable alternative proprietary adhesive system. If the insulation boards are to be mechanically fixed, the vapour control layer should be loose–laid.
  • General guides for Flat Roof Installation
  • Where one run of the specified vapour control layer laps another, there should be minimum 150 mm side and end overlaps, which should be adequately sealed.
  • Turn up the vapour control layer at the edge of the roof to a height appropriate to the specified new waterproofing membrane.
  • Boards of Kingspan Thermaroof TR26 should be bonded down by laying into hot bitumen (max. temperature 240°C) mopped or poured over the vapour control layer, or with the use of a suitable alternative proprietary adhesive system.
  • Alternatively, the insulation boards should be secured to the deck using mechanical fixings e.g. telescopic tube fasteners (see ‘Mechanical Fixings’ below).
  • Insulation boards should always be laid break–bonded, either with their long edges at right angles to the edge of, or diagonally across the roof, and with joints lightly butted. There should be no gaps at abutments.
  • Roof–light or ventilator kerbs etc. should always insulated with the same thickness of Kingspan Thermaroof TR26 as the general roof area.
  • A 30 mm thick Kingspan Thermaroof TR26 upstand should be used around the perimeter of the roof on the internal façade of parapets.
  • A minimum distance of 300 mm should be maintained between the top of the insulation upstand and the bottom of the horizontal roof insulation.
  • The waterproofing membrane is installed in accordance with the membrane manufacturer’s instructions, over the whole insulated area including any insulation upstands, as soon as possible after laying the insulation boards.
  • Mechanical Fixings
  • The number of mechanical fixings required to fix Kingspan Thermaroof TR26 will vary with the geographical location of the building, the local topography, and the height and width of the roof concerned along with the deck type.
  • A minimum of 4 fixings are required to secure 1.2 x 0.6 m boards of Kingspan Thermaroof TR26 to the deck.
  • The requirement for additional fixings should be assessed in accordance with BS / I.S. EN 1991−1.4: 2005 + A1: 2010 (National Annex to Eurocode 1. Actions on structures, General Actions, Wind Actions).
  • Mechanical fixings must be arranged in an even pattern.
  • Fasteners at insulation board edges must be located > 50 and < 150 mm from edges and corners of the board and not overlap board joints.
  • Each fixing should incorporate a square or circular plate washer (min. 50 x 50 mm or 50 mm diameter).
  • If two layers of insulation are to be installed, the base layer should be mechanically fixed with minimum 1 no. fixing in the centre of the insulation board before fixing the top layer as described above.
  • Kingspan TR26 on Timber Deck
    Kingspan TR26 on a timber deck with plasterboard ceiling
    Kingspan TR26 on Metal Deck
    Kingspan TR26 on a metal deck with no ceiling
    Minimum order level - £175.00 ex-VAT. For further details on Delivery Charges and Minimum Order levels, please Click Here